Both the paper Oil Record Book and an approved electronic one are legal under MARPOL Annex I. The amendments in IMO resolution MEPC.314(74), in force since 1 October 2020, added the electronic record book as a lawful alternative, with the guidelines in MEPC.312(74) setting the conditions. So this is not a choice between a compliant option and a non-compliant one. It is a choice between two media that have to satisfy the same regulation in different ways, and they handle some of those requirements very differently.